Apparatus for use in the treatment of pulverulent or granular materials with gases



Oct. 23 1923. 1,471,619

R. MARTIN ET AL. APPARATUS FOR USE IN THE TREATMENT OF PULVERULENT OR GRANULAR MATERIALS WHI'IH GASES 2 Sheets-Sheet 1 Filed Feb. 26 1921 Oct. 23 ,1923. 1,471,619

, R- MARTIN ET AL APPARATUS FOR USE IN THE TREATMENT OF PULVERULENT OR GRANULAR MATERIALS WHITH GASES Filed Feb. 26. 1921 2 Sheets-Sheet 2 RICHARD MARTIN, or SWANSEA,

Ania JOHN Isaac RICHARDS, orjrsrALYrnRA, its- W HSE WALES. I a

APPARATUS non USE n THE TREATMENT or ruLvEaULENT on GnAnuLAa MATE- RIALS wrrnensns. I

Application filed February 26, 1921. Serial No. 448,221.

To all whomit may-concern." I I Be it known that we, RICHARD MARTIN, a subject of the King ofGreat Britain and Ireland, and residing at Exeter Villa, Uplands, Swansea, in thecounty of Glamorgan, Wales, and JOHN lsaAo-RroHAnosga subject of the'King ofGreat Britain and Ireland, and residing at Upper Clay Works, Ystalyfer'a, near Swanseafin the county of Glamorgan, Wales, have invented certain new and useful Improvements in Apparatus for Use in the Treatment of Pulverulent or Granular Materials with Gases, of which the following is a specification; This] invention relates to apparatus for usein the treatment, of pulverulent or granular materials in a current of gas and is particularly concerned with theroasting ofores and the like. i

V The object of the invention, broadly stated, is to provide improved means for conveying the granular or pulverulent material treated through .a chamber as, for

instance, airoasting furnace, in which the 2 material is subjected to the action of a gas current and to expose fresh surfaces of the material therein to the action of the heated gases. 7

A further object of the invention is to provide an improved furnace adapted for use in roasting ores and thelike of the kind comprising a plurality of hearths or floors arranged one above another and openings adjacent to alternate ends ofthese floors or hearths whereby the material treated may be transferred from one floor on to the floor or hearth situated next below, and means adapted to cause the ore to travel over these floors or hearths in succession;

According to the invention, a member provided with a scraper element and a plurality of plough elements is caused to travel over the floor or hearth on which the granular or pulverulent material isdeposited, 'alternately in a backward and forward direction and means isassociated with the said member whereby the motion of the said member causes the scraper-element or the plough elements as the case may be to. be brought into operation to convey the ma} terial over the fiQQlf'Qr hearth or to expose offthe current of gas.

fresh surfaces of the material tothe action.

Thus in accordance with the invention the member provided with the scraper blade and the plough elements may be pivotally connected to themeans whereby the 'said member is caused to travelbackward-and forward wlthin the chamber and associated with means adapted to bear upon the floor or hearth thereof or the material thereon and to rotatethe member about its :pivotal connection to bring the scraper blade or plo'u'ghs, according to the direction in which the said-member is moving, into position to operate upon the material:

The means adapted to bear upon the floor or hearth may be constituted bya member, 1 I

such as a segment or sector-shaped member, the curved'face of which islarranged adjacent to the floor or hearth so that theffric-f tionbetween the curved face and the hearth will cause the member provided-with a scraper element and! plough elements to be rotated about its pivotal connection with themeans whereby it iscaused to travel ranged at suitable'distances in front .ofzone another in 'associationwith' eachlfloor or hearth. 1

[ The scraper -may be inthe form' of blade extending substantially across the points at suitable distances apart to brackets which 'ar'e connected to a: bar as ,..for. m? stance, by passing the lugof each of these tbrackets' through a hole in the bar and whole width of the chamber and secured at passinga pin'through a'hole provided for this' purpose in the lug,or they maybe proyided withsleeves adapted to he slipped over the'bar, and the scraper blade may be of such depth that aportion of the material operated upon will pass'o'r flow overthe top edge thereof. The *ploughs -may .be sinnlarly secured to brackets secured to the bar which is provided with 'pivots at its ends,

lfQll fnalled'in holes'prorided in blocks se-l l thescraper element and plough elements maybe secure dtoflexible members, such as. chains or metallic bands, or ropes arranged to" pass through the furnacefromend to end and to be set in motion by suitable means in order that thecombinedscraper and plough elements may be moved alter-- nately ina backward and forward direction.

When flexible memberssuch as chains or bands are employed for this-'purpose, they may be=passed over guide sprockets or pulleys arranged adjacent to the' front or rear wall of the" furnace and thence in an upward or downward direction over suitable sprockets or pulleys adapted' to impart to them the'rrequired motion.

This arrangement-{as will be recognized, results in economy of space ascompared with the arrangement in which: the combined scraper and plough elements are secure'dto bars which are adapted to cause these' elements to travelover the floors or hearths. 1 One construction in accordance with the invention is illustrated by way of example in the accompanying drawings, inwhich Figure 1 is a section through a furnace provided with devices-in accordance with the invention,'and 1 Figure 2 is a corresponding plan view.

In the drawings,,l are the chambers ofthe furnaces, 2 the floors thereof, 3 apertures in the floors through which the material passes from fioor to fioor, 4 the scraper blades extending across the whole width of the chambers, 5 the plough element, 6 the brackets to which the. scraper blades and plough members are secured to the bars 7 which for the greater portion of their length areiof rectangular cross-section and engage holes in these brackets of similar form. 8 are frames provided with bearings, 9, 9 in which the ends of the bar which at this position is of circular cross-section, are engagedu The frames are connected with wire cables or bands 10 when necessary formed, as are the other portions of the device which are subjected to, a high temperature, ofsuitable heat. resisting alloys adapted to withstand temperatures of 1 OO0 Fahrenheit,

whichpas's over jockey pulleys'llassociated with tensioning means 12 arranged on one side of thefurnace and withbands or cables 13 passing over pulleys l4 securedron shafts 1-5 which are for suitable periods of time rotated in a clockwise and anti-clockwise directlon to secure the desired reciprocatory ber as,-.for' instance,a roasting furnace, in

which the material is subjected to the action of a gas current, and for exposing fresh surfaces of the material therein to, the action of the heated gases, comprising a member provided with a scraper element and a plurality of plough elements, means whereby said member is caused to travel alternately in a backwardand forward direction through the chamber and means whereby motion in the one direction causes the scraper element to be brought into 'positionto operate on the material on the fiooriof said chamber and conveymaterial therethrough and motion in the other direction removes the scraper, element from the said position and brings the ploughelements into position to operate on the material on the floor of the chamber in,

order to expose fresh surfaces of the material to the action of the current of gas.

2. Improved means for conveying granular or pulverulent material through a chamber as, for instance, a roasting furnace, in which the material is. subjected to the action of a gas current, and for. exposing fresh surfaces of the material therein to the action of the heated gases, comprising a member provided with a scraper element and a plurality of plough elements, means whereby said member is caused to travel in a backward and forward direction through the chamber, a pivotalconnection between the member and said means and members adapted to bear upon the material on the floor of the chamher and by frictional contact therewithto rotate the member provided with a scraper element and plough elements to bring the scraper blade or ploughs into position to operate on the material.

3. Improvedmeans for conveying granular or pulverulent material through a'chamber as. for instance, a roasting furnace, in

which the material is subjected to the action on the floor ofthe chamber and by frictional lar o1 pulverulent material throu h a chamber as, for instance, a roastmg urnace, 1n

which the material is subjected to theaction of a gas current, and for exposing fresh surfaces of the material therein to the action of the heated gases, comprising a member pro vided with a scraper element in the form of a blade extending substantially across the, whole width of the chamber, a plurality of brackets securing the blade to the member,

plough elements, brackets securing said plough, elements to the member, means whereby said member is caused to travel'in' a backward and forward direction through the chamber, a pivotal connection between the member and sald means, and members c adapted to bear upon the material on'the fioorof the chamber and by frictional contact therewith to rotate the member provided with a scraper element and plough elements to bring the scraper blade orploughs into position to operateon the material.

In testimony whereof we have signed our names to this s e'cificati'on.

" RIC RD MARTIN.

JOHN ISAAC RICHARDS. 

